Díaz has also performed in theater, motion pictures and television. In the 1960s he became a comedian in Venezuela. He had the leading role in three plays, and in films like El Reportero[5] and Isla de sal;[6] has produced and hosted 12 different TV shows, all of them devised to promote Venezuelan music. One of these shows, Contesta por Tío Simón, was devoted to teaching popular culture to children. This children's show was on the air for 10 years, during which time Díaz's viewers began calling him "Uncle Simón".[1][7] Diaz had a daily radio show for twenty-five years which focused on folklore and Venezuelan music. He has recorded over 70 records[3][8] and CDs and has made innumerable performances throughout his career.[1][9]

The Latin American TV channel A&E MUNDO produced a documentary dedicated to Díaz under its “Biography” program that honors Diaz's many contributions to Venezuelan culture, the program began airing in September 2004.[3]

^ abc"Simon Diaz". National Geographic Music. NationalGeographic.com. Retrieved 2009-10-24."His most celebrated songs include "Caballo Viejo", which became a smash hit in a crossover genre known as charanga vallenata, and "Bamboleo", recorded by the Gipsy Kings and Celia Cruz. His works have been performed and recorded by a who's whom of international music, from Plácido Domingo to Ivan Lins. Well into his 70s, Diaz maintains an active artistic life, and continues his performing and touring career with appearances throughout Latin America and the United States, including a slated performance in 2006 at Carnegie Hall."